<PAGE>
MEMORANDUM
NUVEEN TAX-FREE UNIT TRUST, SERIES 1177
FILE NO. 333-40184
The Prospectus and the Indenture filed with Amendment No. 1 of the
Registration Statement on Form S-6 have been revised to reflect information
regarding the execution of the Indenture and the deposit of bonds on July 7,
2000, and to set forth certain statistical data based thereon. In addition,
there are a number of other changes from the Prospectus as originally filed to
which reference is made, including the increase in the size of the Fund, a
corresponding increase in the number of Units and a change in the individual
trusts constituting the Fund. All references to the Units, prices and related
statistical data will apply to each trust of the Fund and the Units thereof
individually.
Except for such updating, an effort has been made to set forth below certain
of the changes and also to reflect the same by redlining the marked counterparts
of the Prospectus submitted with the Amendment.
FORM S-6
FACING SHEET. The file number and 487 election are now shown.
THE PROSPECTUS
The "Estimated Long-Term Return" and "Estimated Current Return" to
Unitholders under each Trust under each of the distribution plans;
Essential information for each of the Trusts, including applicable
footnotes;
The Date of the Deposit;
The size and number of Units of each of the Trusts;
The estimated daily accrual of interest under the plans of distribution for
each of the Trusts;
Data regarding the composition of the portfolio of each Trust;
Disclosure regarding the states' economic and legislative matters relevant
to investors of state trusts;
Concentrations of issues by purpose in each Trust;
The approximate percentage of the bonds in the portfolio of each Trust
acquired in distributions where the Sponsor was either the sole underwriter
or manager or member of the underwriting syndicate;
The percentage of "when issued" bonds in the portfolio of each Trust;
The schedule of investments for each Trust, including the notes thereto;
Descriptions of the opinions of the special tax counsel for state trusts;
The Record Dates and Distribution Dates for interest distributions for each
Trust;
The Statements of Condition for each Trust and the Accountant's Report with
regard thereto; and
The amount of the Trustee's Fee.
CHAPMAN AND CUTLER
Chicago, Illinois
July 7, 2000
